Question

What are the zeros of the quadratic function f(x)=8x2-16x-15

Answer 1

Answer: c on edge

Explanation:

x=1-square root 23/8 and x=1+square root 7

Answer 2

x = 2.696, x = -0.696

Explanation:

We are given the following function of x and we are to find the zeros for the given quadratic function:

`f(x)= 8x^2-16x-15`

To find its zeros, we will use the quadratic formula:

`x=(-b+-√(b^2-4ac) )/(2a)`

Substituting the values in the formula where
`a=8`,
`b=-16` and
`c=-15`.

`x=(-(-16)+-√((-16)^2-4(8)(-15)) )/(2(8))`

`x=(16+-√(736) )/(16)`

`x=(16+27.13)/(16)` ,
`x=(16-27.13)/(16)`

`x = 2.696` ,
`x=-0.696`

Therefore, the solutions are 2.696 and -0.696.